You won't find 3.07 gears in a ZJ, unless you find one of the EXTREMELY rare 1993s with a 5-speed. That was the only year Jeep offered a manual transmission in the ZJ. All others are automatic and will have either 3.54s or 3.73s.
I thought this was unusual. http://inlandempire.craigslist.org/cto/3020282650.html